Multiple-drill machine



Apr. 24, 1923.

1,452,920 J. MCLELLAN MULTI PLE DRILL MACHINE Filed Aug- 4. 1921 v 2Sheets-Sheet 2` /l/l//II/ lill/Ml,

Wlll/ NVENTOR.

Patented pr. 24, 1923.

Frillllbl lllE.

JOHN MCLELLAN, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR, BY MESNE ASSIGN-MENTS, TO MULTIPLE DRILIJING MACHINE COMPANY, A CORPORATION OF RHODEISLAND.

MULTIPLE-DRILL MACHINE.

Application led August 4, 1921.

Y 10 all whom it may concern.

Be it known that I, Jol-IN MCLELLAN, citizen or' the United States,residing at Providence, in the county of Providence and State of RhodeIsland, have invented certain new and useful Improvements inMultiple-Drill Machines, of which the following is a specilcation.

My invention relates to machines of this type adapted for drilling holesin articles of various materials for any desired purpose wherein aplurality or series ot holes in either alignment or parallelism areconvenient. The present invention is an improvement of the United StatesPatent No. 1,075,588 issued to me @ctober 14, 1913.

The essential objects of my present invention are to render the drilldriving plate ac cessible, whereby the entire machine need not bedismantled to remove the plate; to facilitate substitution of drilldriving and holding plates ot' various sizes and forms; to accommodatethe machine to the reception of drills disposed in a multiple series,

or any other desired convenient arrangement; to enable accurateadjustment of the drill holder blocks relatively to the driving plate;to enable a rapid and accurate initial positioning of the driving`plate; to prevent accidental cramping of the driving plate;

and to attain these and other ends, which will occur to those versed inthe art, in a smoothly operating and inexpensive structure.

To the above ends essentially myy invention consists in such parts andin such combinations of parts as fall within the scope or' the appendedclaim.

In the accompanying drawings which form apart of this specification,

Figure 1 is a Jfront elevation of machine` embodying my invention,

Figure 2, a longitudinal vertical section on line 2 2 of Figure 1,

Figures 3 and 4, transverse sections of the same on lines 3 3 and 4 4respectively of Figure 2,

Figure 5, a section on line 5 5 of Figure 1, and

Figure 6, a front elevation, partially in vertical section, of the drillholder blocks.

Like reference characters indicate like parts throughout the views. p

The framework of my machine may be of Serial No. 489,663.

any construction adapted to co-nveniently carry the operating mechanism.In the form thereof herein shown it includes a base 10, a standard 11upon its rear end, an intermediate support 12, and, upon its forward enda transversely disposed support 13 provided with lateral uprights 14 anda cross piece 15 connected to the latter by bolts 16.

ln detail the support 12 has in this instance a base portion 17 and acircular upper portion 19 provided with acylindrical bore 2O whichconstitutes an annular supporting portion. A constituent part of thissupport is a detachable circular face plate 22 provided with a centralopening 23, and having an annular boss 24 together with a marginalannular flange 25 upon its rear face. The latter is a sliding fit in thebore 20. 'The plate is engaged with the annulus 19 by a circular seriesot' screws 27 passing through holes 28 in the face plate and vengagingin threaded holes 29 in annulus.

Fast in the standard 11 is a spindle or horizontal shaft 32 upon whichis revolubly mounted a pulley 33 comprising a hubl 34,121v

in this instance abuts against the standard` 11. Integral with the inner'face of the pulley rim 36, or fastened thereto in any convenient manneris a flange or dislr 47 provided with an eccentric bore 48E.y Slidablymounted in flange 47 is a circular driving dislr 50 with side Jfaces inslidable contact with the abutment 24 and end thrust disk 40. Integralwith the center of the member 50 is a cylindrical boss 52 extendingthrough the opening 23 of the attaching plate. Detachably mounted uponthe end of the boss is a driving plate 54, preferably disk shaped, whichhas a centrally disposed stud 56 upon its rear face provided with athread 57 adapted to engage a thread 58 in an axial recess 59. Thethreaded socket 59 is slightly deeper than the length of the boss toinsure a tight trictional contact of the plate 54 with the boss. Thelatter is provided with a slot 61 to accommodate a Wrench for facilitating detachment of the two driving members. The plate is providedwith a diametrically disposed series of holes 62 to loosely receive theinner ends of the drills G3, each of which comprise a straight body oroperating portion el, an inclined intermediate portion 65, bent at anangle to correspond with the eccentricity of the iange e8, and an offsetend portion G6 registering in one of the holes.

A sectional drill holder 69 is provided of any preferred shape. In thiscase it comprises a pair of blocks 70, cach of whose contiguous faces 71is provided with parallel longitudinally disposed slots 73, and with aseries of transversely disposed semi circular registering holes 75. Theportions 64 of the drills are rotatably mounted in these holes, andcollars 77 fast to said portions and in staggered relation to eachother, are loose in the slots 73. With the drills thus arranged theblocks are clamped to get-her by means of bolts 79.

The described holder is vertically and horizontally adjustable in guideflanges S1 fast to the upright 14 of the frame, and rests upon spacingplates S3 placed on the support 13 with their endsbetween ianges. Vertically disposed clamping screws 85 threaded in the cross piece 15engage the top of the holder 69, and horizontally disposed adjusting'screws 87 threaded in the uprights engage the lateral -sides thereof.

The machine is operated as follows: The pulley 33 is driven by a belt orotherwise from any convenient source of power, and through the eccentricflange 4157 moves the disk 50 bodily in a circular path invaryingparallel horizontal planes, and without any revolution of thedisk upon its own center. The degree of eccentricity of the flange 47corresponds with the angle of inclination of the intermediate portionsof the drills. The movement of the member 50 is imparted through themembers 52 and 56 to the plate 54, Which in turn rotates the drills 62in unison. If desired the members 52 and 56 may be insured againstcramping or strain occasioned by any accidental tilting or rotarymovement of either of them by providing diametrically oppositelydisposed perforated projections 89 upon the periphery of the member 5ftin which are engaged the upper ends of helical springs 91 whose lowerends are engaged in perforated projections 93 on the base 10.

This construction lends itself to the facile substitution of drivingplates 5% of various diameters, and with differingr numbers of drillholding sockets and series of sockets, and with sockets otherwisearranged. To correspond with such substitutions the number of holders 69may be increased or other iolders may be substituted or the holders maybe adjusted in any desired direction. by adding or removing some of theplates S3 or turning' the screws S5 or 87. It will be understood that tofacilitate any substitution the cross piece 15 may be removed byloosening the bolts 16.

ln a multiple spindle drilling machine, a base, an annular support, aretaining plate upon the support provided with a central orifice, astandard on the base, a spindle on the standard, a pulley on the spindleeX- tending within the annular support and provided with an eccentricseat, a driving disk loosely mounted in the eccentric seat in slidablercont-act with the retaining plate, a thrust disk upon the spindleslidably engaging the driving disk, a boss on the driving disk projectingthrough the orifice, a driving' disk detachably mounted on theboss ex- Lgterior of the retaining plate provided with drill sockets., atool holder support on the base adjacent the first support, a toolholder upon the second support, and drills comprisin;r bodies rotatablymounted in the holder, and offset ends in the sockets.

lin testimony whereof l have aihxed my signature.

JOHN MGLELLAN.

